Correlation value calculation circuit

A correlation value calculating circuit comprising:

• a 16-stage multiplier that determines a product of received data and a despreading code;
• a 16-stage first storage that adds a result of calculation in the multiplier and data held in the 16-stage first storage and newly holds a result of addition;
• a 16-stage first selector that selects one of data from the first storage and data obtained by inverting a polarity of said data from the first storage according to a spreading code and outputs the selected data;
• a second storage that holds data of 256 samples;
• a 16-stage second selector that selects one of the data held in the second storage and zero;
• a 16-stage adder that determines a sum of the data selected and output from the first selector and the data selected and output from the second selector;
• a third selector that selects one of results of addition in the 16-stage adder and outputs the result to the second storage;
• and.
• a code generator that/generates a 16-bit code that is a first basic structure of a primary synchronization code, another 16-bit code that is a first basic structure of a secondary synchronization code, and a scrambling code as despreading codes to provide to the 16-stage multiplier, and further generates a 16-bit code that is a second basic structure of the primary synchronization code, another 16-bit code that is a second basic structure of the secondary synchronization code, and a fixed value as spreading codes to provide to the 16-stage first selector.